Google's Noto Serif Tamil is an excellent open-source option with variable weights and is fantastic for long-form reading on websites. However, the "Bold" weight of Noto is designed as part of a continuum, whereas Tamil MN Bold is engineered as a standalone bold statement piece. For pure, unapologetic emphasis, Tamil MN Bold is often the better choice.
Tamil users type fast. In regular weight, a misrendered ண can look like a ந . Tamil MN Bold enlarges the distinguishing features by 15-20%. Studies in typographic legibility (adapted from the Legibility Lab) suggest that bold weights for Dravidian scripts reduce reading errors by 34% on 6-inch screens. tamil mn bold font better
Before switching fonts, look for these three qualities in a true bold typeface: Google's Noto Serif Tamil is an excellent open-source
Tamil MN Bold is better because its x-height and weight match standard sans-serif Latin fonts. You can place it next to Arial or Roboto without the Tamil text looking accidentally smaller or disproportionately thick. Conclusion Tamil users type fast